Periscope STEM Project Worksheet

Science experiments lesson 28: Mirror periscope · Set 497 · 40 questions

What you do (Bounce, bounce, see): 1. An adult cuts a window near the top on one side of the carton and near the bottom on the other. 2. Tape one mirror at 45° behind each window, the two mirrors facing each other. 3. Look into the bottom window and adjust the mirrors until the view is clear. 4. Peep over a table or wall — never point it at the Sun.

1. 1.🛟 Which mirrors are safest for a children’s periscope? (a) broken glass bits (b) big wall mirrors (c) plastic safety mirrors (d) loose glass panes
2. 2.🔍 Which is the odd one out? (a) black cloth (b) dark soil (c) a rough wooden board (d) a shiny steel plate
3. 3.🔭 Which of these reflects light well? (a) dark soil (b) a mirror (c) black cloth (d) a dull brick
4. 4.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) the ground (b) taller walls (c) nothing at all (d) only short walls
5. 5.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is what we measure? (a) the object we look at (b) the same mirrors (c) how clear the view is (d) the same light
6. 6.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the object we look at”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “how clear the view is”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.🔭 How many mirrors does a simple periscope use?
9. 9.🧺 Which of these is needed for the periscope? (a) a balloon (b) a ruler (c) a magnet (d) turmeric powder
10. 10.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the angle of the mirrors”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is the one thing we change? (a) how clear the view is (b) the object we look at (c) the same mirrors (d) the angle of the mirrors
12. 12.🔮 Predict: you hold a written word up to a mirror. The letters look ___. (a) much bigger (b) flipped left to right (c) in colour (d) upside down only
13. 13.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the object we look at is the one thing we change. (a) True (b) False
14. 14.🧺 Do we need a balloon for the periscope? (a) not needed (b) needed
15. 15.True or false: a rough wooden board reflects light well. (a) True (b) False
16. 16.🔭 Which of these reflects light poorly? (a) a shiny steel plate (b) a rough wooden board (c) still clear water (d) a mirror
17. 17.🔭 Which of these reflects light poorly? (a) a dull brick (b) a mirror (c) aluminium foil (d) still clear water
18. 18.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) two small mirrors (b) an empty juice carton (c) sticky tape (d) yeast
19. 19.🔭 Why must the two mirrors face each other and be parallel? (a) to make it heavy (b) so light reaches the eye (c) so it looks shiny (d) so it can float
20. 20.🛟 Who should cut the holes in the juice carton? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
21. 21.🔭 Does still clear water reflect light well or poorly? (a) reflects light well (b) reflects light poorly
22. 22.🔭 At what angle are the mirrors set in a simple periscope? (a) 90 degrees (b) 45 degrees (c) 10 degrees (d) 180 degrees
23. 23.🧺 Which of these is not needed for the periscope? (a) vinegar (b) an empty juice carton (c) a pencil (d) two small mirrors
24. 24.🔭 Does dark soil reflect light well or poorly? (a) reflects light poorly (b) reflects light well
25. 25.🧺 Which of these is not needed for the periscope? (a) a magnet (b) a pencil (c) sticky tape (d) a ruler
26. 26.True or false: dark soil reflects light poorly. (a) False (b) True
27. 27.True or false: a mirror reflects light poorly. (a) False (b) True
28. 28.True or false: still clear water reflects light poorly. (a) False (b) True
29. 29.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) two small mirrors (b) a ruler (c) an empty juice carton (d) vinegar
30. 30.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) sticky tape (b) a ruler (c) a battery cell (d) two small mirrors
31. 31.🔭 How many times does light bounce off a mirror in a simple periscope?
32. 32.🔍 Which is the odd one out? (a) dark soil (b) a dull brick (c) a mirror (d) a rough wooden board
33. 33.🧺 Do we need sticky tape for the periscope? (a) needed (b) not needed
34. 34.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same light”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.True or false: dark soil reflects light well. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) still clear water (b) a shiny steel plate (c) aluminium foil (d) a rough wooden board
37. 37.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the object we look at is kept the same. (a) True (b) False
38. 38.🧺 Which of these is needed for the periscope? (a) a battery cell (b) a magnet (c) a pencil (d) yeast
39. 39.True or false: yeast is not needed for the periscope. (a) True (b) False
40. 40.🔭 Does a rough wooden board reflect light well or poorly? (a) reflects light well (b) reflects light poorly

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